AU3197193A - A pseudorandom noise ranging receiver which compensates for multipath distortion by dynamically adjusting the time delay spacing between early and late correlators - Google Patents

A pseudorandom noise ranging receiver which compensates for multipath distortion by dynamically adjusting the time delay spacing between early and late correlators

Info

Publication number
AU3197193A
AU3197193A AU31971/93A AU3197193A AU3197193A AU 3197193 A AU3197193 A AU 3197193A AU 31971/93 A AU31971/93 A AU 31971/93A AU 3197193 A AU3197193 A AU 3197193A AU 3197193 A AU3197193 A AU 3197193A
Authority
AU
Australia
Prior art keywords
early
prn code
prn
late
composite signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
AU31971/93A
Other versions
AU660757B2 (en
Inventor
Patrick Fenton
Albert J. Van Dierendonck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novatel Inc
Original Assignee
Novatel Communications Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Novatel Communications Ltd filed Critical Novatel Communications Ltd
Assigned to NOVATEL COMMUNICATIONS LTD. reassignment NOVATEL COMMUNICATIONS LTD. Amend patent request/document other than specification (104) Assignors: NOVATEL COMMUNICATIONS LTD.
Publication of AU3197193A publication Critical patent/AU3197193A/en
Application granted granted Critical
Publication of AU660757B2 publication Critical patent/AU660757B2/en
Anticipated expiration legal-status Critical
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7073—Synchronisation aspects
    • H04B1/7085—Synchronisation aspects using a code tracking loop, e.g. a delay-locked loop
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/22—Multipath-related issues
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/709—Correlator structure

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Noise Elimination (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

A receiver for pseudorandom noise (PRN) encoded signals consisting of a sampling circuit, multiple carrier and code synchronizing circuits, and multiple digital autocorrelators. The sampling circuit provides digital samples of a received composite signal to each of the several receiver channel circuits. The synchronizing circuits are preferably non-coherent, in the sense that they track any phase shifts in the received signal and adjust the frequency and phase of a locally generated carrier reference signal accordingly, even in the presence of Doppler or ionospheric distortion. The autocorrelators in each channel form a delay lock loop (DLL) which correlates the digital samples of the composite signal with locally generated PRN code values to produce a plurality of (early, late), or (punctual, early-minus-late) correlation signals. Thus, during an initial acquisition mode, the delay spacing is relatively wide, on the order of approximately one PRN code chip time. However, once PRN code synchronism has been achieved, the code delay spacing is narrowed, to a fraction of a PRN code chip time. There are several advantages to this arrangement, especially in environments wherein multipath distortion in the received composite signal is of the same order of magnitude as a PRN code chip time. <IMAGE>
AU31971/93A 1992-01-24 1993-01-22 A pseudorandom noise ranging receiver which compensates for multipath distortion by dynamically adjusting the time delay spacing between early and late correlators Expired AU660757B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US82566592A 1992-01-24 1992-01-24
US825665 1992-01-24

Publications (2)

Publication Number Publication Date
AU3197193A true AU3197193A (en) 1993-07-29
AU660757B2 AU660757B2 (en) 1995-07-06

Family

ID=25244629

Family Applications (1)

Application Number Title Priority Date Filing Date
AU31971/93A Expired AU660757B2 (en) 1992-01-24 1993-01-22 A pseudorandom noise ranging receiver which compensates for multipath distortion by dynamically adjusting the time delay spacing between early and late correlators

Country Status (9)

Country Link
EP (1) EP0552975B1 (en)
CN (1) CN1031843C (en)
AT (1) ATE187254T1 (en)
AU (1) AU660757B2 (en)
CA (1) CA2087909C (en)
DE (1) DE69327119T2 (en)
DK (1) DK0552975T3 (en)
ES (1) ES2141129T3 (en)
SG (1) SG43672A1 (en)

Families Citing this family (24)

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Publication number Priority date Publication date Assignee Title
US5414729A (en) * 1992-01-24 1995-05-09 Novatel Communications Ltd. Pseudorandom noise ranging receiver which compensates for multipath distortion by making use of multiple correlator time delay spacing
EP1075089B1 (en) * 1993-10-14 2003-01-02 NTT DoCoMo, Inc. Correlation detector and communication apparatus
US5615232A (en) * 1993-11-24 1997-03-25 Novatel Communications Ltd. Method of estimating a line of sight signal propagation time using a reduced-multipath correlation function
FR2733106B1 (en) * 1995-04-11 1997-06-06 Asulab Sa TIME LOCKED LOOP FOR USE IN A GPS SIGNAL RECEIVER
US6023489A (en) * 1995-05-24 2000-02-08 Leica Geosystems Inc. Method and apparatus for code synchronization in a global positioning system receiver
US5953367A (en) * 1995-08-09 1999-09-14 Magellan Corporation Spread spectrum receiver using a pseudo-random noise code for ranging applications in a way that reduces errors when a multipath signal is present
KR19990036303A (en) * 1995-08-09 1999-05-25 마젤란 코포레이션 Receiver and method for reducing multipath errors in spread spectrum receivers used for distance measurement
FR2739695B1 (en) * 1995-10-06 1997-11-07 Sextant Avionique BROADBAND RECEIVER WITH DISTANCE MEASUREMENT BY PSEUDO-RANDOM CODE SIGNALS
FR2741761B1 (en) * 1995-11-27 1998-02-13 Centre Nat Etd Spatiales METHOD FOR THE AUTONOMOUS REDUCTION OF THE ACQUISITION AND TRACKING MISSES OF SPECTRUM SPREAD CODES RECEIVED IN ORBIT
JPH09261128A (en) * 1996-03-22 1997-10-03 Matsushita Electric Ind Co Ltd Spread spectrum communication equipment
US5901183A (en) 1996-09-25 1999-05-04 Magellan Corporation Signal correlation technique for a receiver of a spread spectrum signal including a pseudo-random noise code that reduces errors when a multipath signal is present
JPH10303782A (en) * 1997-04-30 1998-11-13 Matsushita Electric Ind Co Ltd Cdma receiver
US6263448B1 (en) 1997-10-10 2001-07-17 Rambus Inc. Power control system for synchronous memory device
US6154821A (en) 1998-03-10 2000-11-28 Rambus Inc. Method and apparatus for initializing dynamic random access memory (DRAM) devices by levelizing a read domain
CN1214252C (en) 1998-09-15 2005-08-10 三星电子株式会社 Method for increasing interference immunity when receiving signals from satellite navigation systems and device for realising the same
GB9826044D0 (en) * 1998-11-28 1999-01-20 Koninkl Philips Electronics Nv Receiver for DS-CDMA signals
DE10061988C2 (en) * 2000-12-13 2003-02-27 Deutsch Zentr Luft & Raumfahrt Device and method for calculating a correlation between a received signal and a reference signal and simulator
CA2387891A1 (en) 2001-06-08 2002-12-08 Asulab S.A. Radiofrequency signal receiver with means for correcting the effects of multipath signals, and method for activating the receiver
DE60130102T2 (en) * 2001-06-08 2008-05-15 Asulab S.A. Receiver for radio signals with means for correcting multipath effects and methods
US7995683B2 (en) 2007-10-24 2011-08-09 Sirf Technology Inc. Noise floor independent delay-locked loop discriminator
FR2936892A1 (en) * 2008-10-08 2010-04-09 Centre Nat Etd Spatiales SYSTEM AND METHOD FOR DETERMINING A RECEIVER, AND ASSOCIATED RECEIVER
EP3391068B1 (en) * 2015-12-16 2022-04-20 Koninklijke Philips N.V. Systems and methods for synchronising wireless communication for magnetic resonance imaging (mri) systems
EP3874292A4 (en) * 2018-11-01 2022-08-17 Hoopo Systems Ltd. Method and system for radiolocation at reduced data transfer
US20220276389A1 (en) * 2019-05-21 2022-09-01 Deere & Company Satellite navigation receiver for acquisition of gnss signals

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4754465A (en) * 1984-05-07 1988-06-28 Trimble Navigation, Inc. Global positioning system course acquisition code receiver
JPS61770A (en) * 1984-06-13 1986-01-06 Sony Corp Gps receiver
EP0247126B1 (en) * 1985-11-30 1990-05-02 FERRANTI INTERNATIONAL plc Tubular acoustic projector
DE3808328C1 (en) * 1988-03-12 1989-06-29 Standard Elektrik Lorenz Ag, 7000 Stuttgart, De
AU643272B2 (en) * 1990-06-04 1993-11-11 Raytheon Company Global positioning system receiver
US5101416A (en) * 1990-11-28 1992-03-31 Novatel Comunications Ltd. Multi-channel digital receiver for global positioning system

Also Published As

Publication number Publication date
SG43672A1 (en) 1997-11-14
CA2087909C (en) 2004-04-06
AU660757B2 (en) 1995-07-06
ATE187254T1 (en) 1999-12-15
CA2087909A1 (en) 1993-07-25
EP0552975A3 (en) 1994-05-25
EP0552975B1 (en) 1999-12-01
CN1080059A (en) 1993-12-29
CN1031843C (en) 1996-05-22
EP0552975A2 (en) 1993-07-28
DK0552975T3 (en) 2000-03-27
ES2141129T3 (en) 2000-03-16
DE69327119D1 (en) 2000-01-05
DE69327119T2 (en) 2000-06-21

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